Artificial tooth.



H. E. s. GHAYES. ARTIFICIAL TOOTH.

APPLICATION FILED MAR-11. 1907- PATENTBD APR. 21 1908.

' I sisting of a facin j nERMAN-n s. CHAYES, on. NEW YORK, NJYQ J ARTIFICIAL 'roorn. f

Specification of I etters Patent.

' Pa nee April 21, 1908.

Application filed March 11,1907. SeriaI No. 361,663.

T 0 all whom it may concern:

Be it known thatI, HERMAN E. S. CHAYES, a citizen of the United States, anda-resident of the borough of Manhattan, city and State of New York, have invented certain new and useful Improvements in Artificial-Teeth De woes, of which the following is a specification. j

My invention relates to an improved means for securing an artificial tooth, con- 0 of enamel orother'suitable material in the lilrene'ss of a tooth, to a backing of metal' or other suitable material, which backing is anchored or secured in the mouth according to any well known means;

The aforesaid means for securing the facing to thebacking are such as toefiectually lock these parts together against lateral and unintentional vertical motion on each other. The devices are furthermore quickly and .easily operated. They do. not to any'extent weaken the facing member and they are comp ny n aw ne facing embodying my in ention;

cheap to manufacture. Moreover by a certain modification hereinafter described I make the connection between the facing and the backing adjustable vertically so'that the facing, which as stated is in the se nblanoeof a tooth; may be adjusted vertically relative to the gum to' conform 'to any a peculiar condltlonorcharacterlstm thereof.

.- Some of the specific forms which. my inwherein ,lgure 1 s a rearperspectwe View of a vention may take are illustrated in the acfront perspective view ofa'backing adapted to cooperate withsaid facingtFig. 3 is a -ver ticallmid-section of thefacing and backing showing the facing about. to be' ressed upwards intolockedf position on t e backing; Fi .4 shows the same parts in their sald lofired position; Fig} 5 'show's a modification in the facing conslsting"of'jthe' use of two transverse plns instead of "onefFig. 65' is a modification of the backing consisting in the adjustable nature of the lugs relative to the .backing; Figsfl and 8 are enlarged perspectlve views of the lugs shown in Fig. 6 but detaohed: forthe purposes of illustration from the backing plate.

Describm now the, specific forms of my.

invention il ustrate d it. will beuunderstood that the backing 1 isanchored in the mouth in the space left by the missing tooth in any well known manner, as for exam le, by securing same on each side to suita 1e crowns I I on the adjacent teeth.

anysuitable metal.

Fig. 2 is a i press' ti This backing may be Projecting from it (see Figs. '2, 3 and 4) are lugs 2.and 3 which coact as hereinafter described with the facing to secure it rigidly to the backing. This facing, designated 4, takes the form of a tooth and'is, made of enamel or other suitable material. The facing is surfaced on its rear sideto rest against the front surface of the backing. It is also formed on its rear side with a cavity 5 the bottom of which is formed .withan elevated or raised portionfi and the lower end of which as seen best in Figs. 3 and 4 is undercut at 7. Bridging the cavityfi transversely relative to the facing is a pm or strip 8 preferably of metal. The entire lacing together with its cavity will ordinarily be made by casting the same in a suitable mold" and-the pin 8 may be cast integrally into place in the same operation.

The lug 2 on the backingis preferably made of springy material. It preferably also has the arched formshown with its free end recurving towards the front face of the'backing and the extremity thereof curled u ward to permit the pin 8 of the facing rea ily to pass under the free end of the lug asit must when the facing is' forced into looking osition on' the backing. In illustration 0 the foregoing Fig. '3 shows in section the facing 4 inflpositmn against the backing 1 and about to e raised vertically with its in 8 just beginning to force its way under t e free end of the spring lug 2. 'Fig. 4 shows the same ,parts after the facing has been forced ill];-

wards. into its locking. position with t spring lug 2 embacing the pin 8.

' As stated the lug 2 is preferablyformed of springy material in order that itmay coact withthe\ pin "to secure the facing more tightly to the backing. To additionally effectthis same result the bottom of the caVity-S'may be formed with an elevation 6 adapted'to contact withthe lug 2 durin the operation of tpressing the facing into loc ing position on t e backing and thereby ress it toward'the backing and so cause t e lug, after the in '8 has entered within its arch, to

htly against said pin and consequently ock the facing rigidly to the backing. The lug 3of the backingis received into the undercut portion 7- of the facing when the parts have been pressed into locked position and by wedge action holds these parts in looking contact. l

The lugs 2 and 3 are preferably just wide enough to be received between the sides of the cavity 5. The facing is therefore effectually secured against lateral motion on the backing while the lockin devices prevent unintentional vertical disp acement.

- Instead of providing an under-cut portion 7 in the facin to receive the hi 3, I may provide a secon pin 9 bridgingt e cavity (see Fig. 5). In this modification the lug 2 coacts as previously with. the upper pin 8'While the lug 3 coacts with the lower pin 9 by archin' about it in somewhat analo ous fashion.

0' give the lug 3 additional ocking action on thefacing, I rovide aprojection 13 from .the same time permit them to have u and down adjustment relative both to the acking and to each other.

In using my artificial tooth devices the backing will be anchored suitably in the mouth. The cavity in the facing will then be filled with acementing material 12 and then pressed-into locked position on the backing and the cement having hardened, the tooth facing will be securely fixed in place;

Conditions not infrequently arise in prac' tice where the facing and the backing with fixed lugs cannot be adapted to the particu lar mouth to-brin the tooth into the exact location desired re ative to the um ;in this event the backing with the a justable lugs will be employed to adjust the facin into the exact position required. After the ugs have been adjusted on the backing in proper .position, they are soldered fixedly thereto. The use and operation of this modification is otherwise similar tothat described for the facing with the nonadjustable lugs. I

Having thus described my invention, what I claim is 1. In'an artificial tooth device, the combination of a backing having a lug adapted to be received into a cavity in a facing and to hook around a pin across the cavity; said facing; and said pin. V

2. In an artificial tooth device, the combination of a backing formed with a lug of springy material; a facing having a cavity adapted to receive said lug; and a pin across said cavity adapted to be received and held by spring action under said lug.

3. In an. artificial tooth device, the 00111-- bination of a backing formed with a lug of springy material; a facing having a cavity adapted to receive said'lug; a in across said cavity adapted to be receive and held by' spring action under said lug; and a part on the facing adapted to contact with the lug and press the same against the pin.

4. In an artificial tooth device, the combination of a backing having a lug; a facing a pin across. said cavity, adapted to be received between the lug and the backing when the facing is slid longitudinally in contact. with the backing; a part on the facin adapted to contact with the lug and press t e same against the pin; a second lug on,the backing adapted to be received in a cavityin the fac ing and to extend under and contact with an under-cut portion of said facing; and said under-cut portion.

6. In an artificial tooth device, the combination of a backing having a lug; a facing having a cavity adapted to receive said lug; a pin across said cavity, adapted to be received between the lug and the backing when the facing is slid longitudinally in contact with the backing; a part on the facing adapted to contact with the lug and ress same a ainst the pin; a second lug on t e backing a apted to be received in a cavity in the facing and to extend under and contact with a fixed art on said facing.

7. u an artificial tooth-device, the combination of abacking having a lug movably supported thereon and adapted to be firmly secured thereto when properly spaced, said lug being adapted to be received into a cavity in a facing and to hook around a pin across the cavity; said facing; and said pin.

8. In an artificial tooth device, the combination of a backing; a lug on the backing, which lug has a projection thereon; a facing having a cavity ada ted to receive the lug, a wall of said cavity eing recessed to receive the projection on the lug.

In witness whereof, Ihave signed my name to the foregoing specification in the presence of two subseribin witnesses.

HE MAN E. S. (HAYES Witnesses:

H. R. BAUER, E. W. SCI-IERR, Jr. 

